import React from 'react'
import { useLayoutEffect } from 'react'

function Baidu() {
  useLayoutEffect(() => {
    // 百度地图API功能
	function G(id) {
		return document.getElementById(id);
	}

	var map = new window.BMap.Map("l-map");
	map.centerAndZoom("北京",12);                   // 初始化地图,设置城市和地图级别。

	var ac = new window.BMap.Autocomplete(    //建立一个自动完成的对象
		{"input" : "suggestId"
		,"location" : map
	});

	ac.addEventListener("onhighlight", function(e) {  //鼠标放在下拉列表上的事件
	var str = "";
		var _value = e.fromitem.value;
		var value = "";
		if (e.fromitem.index > -1) {
			value = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
		}    
		str = "FromItem<br />index = " + e.fromitem.index + "<br />value = " + value;
		
		value = "";
		if (e.toitem.index > -1) {
			_value = e.toitem.value;
			value = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
		}    
		str += "<br />ToItem<br />index = " + e.toitem.index + "<br />value = " + value;
		G("searchResultPanel").innerHTML = str;
	});

	var myValue;
	ac.addEventListener("onconfirm", function(e) {    //鼠标点击下拉列表后的事件
	var _value = e.item.value;
		myValue = _value.province +  _value.city +  _value.district +  _value.street +  _value.business;
		G("searchResultPanel").innerHTML ="onconfirm<br />index = " + e.item.index + "<br />myValue = " + myValue;
		
		setPlace();
	});

	function setPlace(){
		map.clearOverlays();    //清除地图上所有覆盖物
		function myFun(){
			var pp = local.getResults().getPoi(0).point;    //获取第一个智能搜索的结果
			map.centerAndZoom(pp, 18);
			map.addOverlay(new window.BMap.Marker(pp));    //添加标注
		}
		var local = new window.BMap.LocalSearch(map, { //智能搜索
		  onSearchComplete: myFun
		});
		local.search(myValue);
	}
  })
  return (
    <div>
      <div id="l-map"></div>
	<div id="r-result">请输入:<input type="text" id="suggestId" size="20"  style={{width:150}} /></div>
	<div id="searchResultPanel" style={{border:'1px solid #C0C0C0', width:150,height:'auto', display:'none'}}></div>
    </div>
  )
}

export default Baidu
